/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package grpc

import (
	"google.golang.org/grpc"
	"google.golang.org/grpc/metadata"
)

type wrapper struct {
	grpc.ServerTransportStream
	header, trailer metadata.MD
}

func (w *wrapper) Method() string {
	return w.ServerTransportStream.Method()
}
func (w *wrapper) SetHeader(md metadata.MD) error {
	if err := w.ServerTransportStream.SetHeader(md); err != nil {
		return err
	}
	w.header = md
	return nil
}
func (w *wrapper) SendHeader(md metadata.MD) error {
	if err := w.ServerTransportStream.SendHeader(md); err != nil {
		return err
	}
	w.header = md
	return nil
}
func (w *wrapper) SetTrailer(md metadata.MD) error {
	if err := w.ServerTransportStream.SetTrailer(md); err != nil {
		return err
	}
	w.trailer = md
	return nil
}
